WorksheetsPhysical Sciences
Total questions: 15
Worksheet time: 8mins
A wave in which the particles of the medium vibrate at right angles to the pathalong which the wave travels through the medium, is produced by…
a bat.
a car's hooter
an ambulance
an X-ray machine
Two identical spheres, X and Y, on insulated stands, carry charges of 3 µCand -5 µC respectively. The spheres are brought into contact with each otherand returned to their original positions. The charge on EACH sphere aftercontact is …
8 µC
-4µC
-2µC
-1µC
How will the readings on ammeters A1, A2 and A3 compare with each other?
A1 = A2 = A3
A1 = A2 + A3
(A2 + A3) ˃ A1
A2 ˂ A3˂ A1
The SI unit for gravitational potential energy is …
kg∙m∙s^-1
kg∙m∙s^-2
kg∙m^2∙s^-2
kg∙m^-1∙s^-1
Which ONE of the following pairs of physical quantities consists of one scalar and one vector quantity?
Distance and speed
Speed and acceleration
Displacement and velocity
Velocity and acceleration
The force between two magnets decreases when…
two like poles come closer together.
two unlike poles come closer together.
the distance between them increases.
the distance between them decreases
A motorbike moving at a speed v, has a kinetic energy E. If the speed of the motorbike increases to 3v, the kinetic energy will be...
3E
⅓E
6E
9E
The energy transferred per unit electric charge in a circuit is…
current.
charge.
power.
potential difference.
The number of waves passing a point every second is defined as the … of the wave.
speed
amplitude
wavelength
frequency
A rubber balloon obtains a negative charge after it has been rubbed againsthuman hair.Which ONE of the statements below best explains why this happens?
Negative charges are transferred from the rubber balloon to the human hair.
Positive charges are transferred from the rubber balloon to the human hair.
Positive charges are transferred from the human hair to the rubber balloon.
Negative charges are transferred from the human hair to the rubber balloon.
Substances that have constant resistance over wide range of voltages are
ohmic
non ohmic
resistive
non resistive
As compare to short wires, long wires have
more resistance
no resistance
less resistance
same resistance
Device that disconnects supply automatically if current exceeds normal value is known as
circuit breaker
fuse
cable
capacitor
As per Ohm's law, V (potential difference) is equal to
I(current)×R(resistance of the conductors)
I(current)/R(resistance of the conductors)
R(resistance of the conductors)/I(current)
I(current) + R(resistance of the conductors)
A resistor having resistance 6.2Ω is connected across a battery of 5 V by means of a wire of negotiable resistance. Current passes through resistor is 0.4 A. total power produced by battery is
2 W
3 W
5 W
6 W
