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WorksheetsPhysics Interview
Total questions: 38
Worksheet time: 47mins
Convert 57,000,000 in scientific notation:
5.7 x 107
5.7 x 10-7
5.7 x 106
5.7 x 10-6
Convert the values to the indicated units 0.0056 km to mm
56,000
5,600
560
56
What is the base unit and symbol of Luminous intensity?
Mole, mo
Kelvin, K
Candela, Cd
Meter, m
Which of the following refers to how closely a measured value agrees with the correct value?
Accuracy
Precision
Measurement
Quantity
If you weigh a given substance five times, and get 3.2 kg each time, then your measurement is:
Accurate
Precise
Undefined
None of the Choices
The statement “Precision is independent of accuracy. You can be very precise but inaccurate. You can also be accurate but imprecise.” Is:
True
False
Maybe
Never true
You perform an experiment to measure the temperature at which the water boils. The true value of temperature where water boils is 67 °C. You set up five containers of water and heat each one. At the instant the water boils you measured the temperature and got the following results:
35°C 35°C 35°C 35°C 35°C
High precision but low accuracy
High precision and high accuracy
Low precision and low accuracy
High accuracy but low precision
When scientists refer to experimental errors, they are not referring to what are commonly called mistakes, blunders, or miscalculations. Sometimes also referred to as the following except:
“illegitimate” errors
“human” errors
“personal” errors
“impractical” errors
What type of error is depicted on the statement “The cloth tape measure that you use to measure the length of an object had been stretched out from years of use. (As a result, all of your length measurements were too small)”?
Random Error
Systematic Error
Irregular Error
Accidental Error
The first length measured in a laboratory experiment is 2.5 + 0.1 m and the second length 3.4 + 0.1 m. What is the uncertainty of the sum of the lengths?
0.1 m
0.2 m
0.3 m
0.4 m
Product of Force and Speed is called
Work
Power
Energy
Force
Work is equal to which of the following?
The relation between force and its direction angle
The product of time and force
force divided by time
The product of force, displacement and the cosine of the angle between them
The work done by friction force is always
positive
negative
zero
either positive or negative depending on the situation
Two forces have magnitudes of 11 newtons and 5 newtons. The magnitude of their sum could NOT be equal to which of the following values?
16 N
5 N
9 N
7 N
A ball leaves a girl's hand with an upward velocity of 6 meters per second. What is the maximum height of the ball above the girl's hand?
(a)
A boy throws a ball vertically upward with a velocity of 6 meters per second. How long does it take the ball to return to the boy's hand?
(a)
A certain machine exerts a force of 200 newtons on a box whose mass is 30 kilograms. The machine moves the box a distance of 20 meters along a horizontal floor. What amount of work does the machine do on the box?
(a)
With reference to a swinging pendulum, which among the following statements is correct when it is at bottom (middle of arc)?
It has maximum kinetic energy and minimum potential energy
It has zero kinetic energy
It has maximum potential energy and minimum kinetic energy
It has zero total energy
Work done will NOT be zero in which of the following case/cases?
When displacement is zero
When angle between force and displacement vector is zero
Whan angle between force and displacement vector is 90°
When force is zero
Light year is a unit of
Time
distance
light
intensity of light
Light from the Sun reaches us in nearly
2 minutes
4 minutes
8 minutes
06 minutes
An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
1200 m
0.33 km
3.33 km
33 km
How can you determine the electric field inside a conductor?
Measure the force between two charges
Measure the voltage between two points
Measure the current between two points
Measure the potential difference between two points
What is the electric field at the center of a charged ring?
It is zero
It is constant
It is proportional to the charge
It is inversely proportional to the distance
What two factors determine the strength of electric force?
Charge and distance
Voltage and current
Voltage and distance
Charge and current
What is the formula for calculating electric force?
F = ma
F = Gm¹m²/r²
F = q¹q²/r²
F = kq¹q²/r²
What is the value of the electric force constant (k)?
9.8 x 10⁹ N m²/C²
9 x 10⁹ N m²/C²
4.2 x 10⁹ N m²/C²
8 x 10⁹ N m/C2
What is the difference between electric force and magnetic force?
Electric force is stronger than magnetic force
Electric force is weaker than magnetic force
Electric force is created by moving charges, while magnetic force is created by stationary charges
Electric force is created by stationary charges, while magnetic force is created by moving charges
What is the electric potential of a point charge?
The amount of energy stored in the point charge
The amount of work needed to move a unit of charge to the point charge
The amount of voltage between the point charge and the ground
The amount of charge stored in the point charge
What is the effect of increasing the distance between two-point charges on their electric potential?
The electric potential will decrease
The electric potential will remain the same
The electric potential will increase
The electric potential will become negative
How does electric potential vary with distance?
It decreases with increasing distance
It increases with increasing distance
It remains constant with increasing distance
It decreases with decreasing distance
What is the electric potential if the electric field strength is 50 Volts/meter?
50 Volts
50 Joules
50 Volts/meter
50 Joules/meter
What is the electric potential difference of a 0.3 farad capacitor with 0.3 coulombs of charge?
0.3 V
0 V
1 V
3 V
Calculate the amount of charge that flows from a 9V battery when it is connected to a 3 μf capacitor.
2.5 x 10−⁴ C
2.5 x 10−⁵ C
2.7 x 10−⁵ C
2.7 x 10−⁴ C
What is the electric potential difference of a 0.3 farad capacitor with 0.3 coulombs of charge?
0.3 V
0 V
1 V
3 V
Calculate the capacitance of a capacitor that has two plates, with the dimensions 2 mm by 1 mm, separated by 0.5 mm.
3.54×10−¹² F
3.54×10−¹⁴ F
3.54×10−¹⁵ F
3.54×10−¹ᶟ F
A 6 mC charge is placed in an electric field at a point where the magnitude of the electric field is 2.67 x 10⁷ N/C. Calculate the magnitude of the electrostatic force acting on the charge.
1.6 x 10⁵ N
1.6 x 10⁴ N
1.5 x 10⁵ N
1.5 x 10⁴ N
