NEW
Font size
WorksheetsCape Physics Unit 2 module 1
Total questions: 25
Worksheet time: 4hrs 10mins
In the equation for the current through a conductor, I = neva v represents the
A. Voltage
B. Terminal p.d
C. Volume
D. Velocity
2. When a potential difference of 2V is applied across a resistor, 10J of energy are converted to thermal energy. What charge flows through the resistor?
A. 0.2C
B. 5C
C. 12 C
D. 20 C
Q3. Given that a wire of length L and area A has resistance R what is the resistance of a wire of similar material which is twice as long and half the diameter?
A. 1/4 R
B. 2R
C. 4R
D. 8R
Q4. For the circuit diagram below, determine the current flowing through the 6ohm resistor.
A. 0.75 A
B. 0.82 A
C. 1.0 A
D. 1.5 A
Q. 5 The SI unit of electric field strength is
A. NA^-1
B. N C^-1
C. Cm^-1
D. Jm^-1
Q.6 The expression used to determine the output voltage for a potential divider is
A. V0 = I ( R1- R2)
B. V0 = Vin ( R1+ R2/R1)
C. V0 = Vin ( R1/ R1+ R2)
D. V0 = I ( R1 + R2)
Q 7. The work done per unit charge in bringing a small positive charge from infinity to a point is the definition of
A. Potential energy
B. Potential
C. Electric field strength
D. Potential gradient
Q. 8 One farad is equivalent to
A. 1 J C^-1
B. 1 N C^-1
C. 1 C V^-1
D. 1 V C^-1
Q. 9 A wire carrying a current into the plane of the paper is shown below. It is acted upon, in turn by four magnetic fields acting in the directions shown. Which field exerts on the wire a force towards point P?
A. W
B. X
C. Y
D. Z
Q. 10 The capacitor in the circuit above has capacitance, C. It is charged to a voltage, V, and then discharged through a resistor with resistance, R. The charge at any time, t, is given by
A. Q = C/V e^ -t/RC
B. Q = V/C e^-t/RC
C. Q = CV e^RC/t
D. Q = CV e^-t/RC
Which of the following diagrams shows the current direction of the forces on two wires carrying current in opposite directions?
A
B
C
D
A road is 15m below a transmission line which carries an alternating current of peak value 100A. The magnitude of the peak magnetic flux density at the road (due to the current in the transmission line) is
A. 1.33 X 10^-6 T
B. 4.19 X 10^-6 T
C. 1.26 X 10^-1 T
D. 1.18 X 10^-2 T
The diagram above is the I-V curve for a specially constructed device. In which part of the graph does the device act as an ohmic conductor?
A. A-B
B. B-C
C. C-D
D. D-E
What is the value of the x if the galvanometer reads zero?
A. 1Ω
B. 4Ω
C. 10Ω
D. 25Ω
A conductor of length 0.10m is placed in a magnetic field of 9mT at an angle of 60 degrees to the field direction. It has a current of 2 A. Calculate the force on the conductor due to the field.
A. 8 x10^-4 N
B. 9 X 10 10^-4 N
C. 1.6 X 10^-3 N
D. 1.8 X 10^-3 N
I = I0 sin ωt
A.C. may be represented by the equation. I0 is
A. r.m.s. current
B. peak current
C. instantaneous current
D. average current
A sinusoidal signal has a peak voltage of 5.0V. What is the r.m.s. value of this signal?
A. 2.50 V
B. 3.54 V
C. 6.25 V
D. 7.07 V
10Ω
What is the current in the resistor
A. 0 A
B. 2 A
C. 6 A
D. 10 A
In which of the circuits below is the capacitor connected to give a smooth rectified output voltage across the load (R)?
A
B
C
D
Which of the following diagrams shows the correct arrangement for a full wave rectifier circuit?
A
B
C
D
An example of an INPUT transducer is a
A. relay
B. buzzer
C. thermistor
D. light-emitting diode
Which one of the circuits is NOT a non-inverting amplier?
A
B
C
D
An operational amplier has ___________gain
A. High
B. Low
C. Zero
D. Medium
An operational amplifier has_______inputs
A. single
B. similar
C. two
D. Differential
A PN junction is said to be forward biased when
A. Positive terminal of the battery is connected to P-side and the negative side to the N-side
B. Junction is earthed
C. N-side is connected directly to the p-side
D. Positive terminal of the battery is connected to N-side and the negative side to the P-side
