These Physics question and answers were pulled from our book ( Physics questions for SS3); Compiled to serve as a reference material to help teachers draw up test and exam questions faster. It could also help students assess their level of exam preparation. Each sample question includes correct answers.
Sample Physics Exam Questions and Answers
ALTERNATING CURRENT
1. The peak voltage in an r.m.s. circuit is 2.0V and the resistance of the circuit is 3.0Ω. Find the peak current flowing.
A. 0.666A.
B. 1.5A.
C. 2.43A.
D. 1.333A
2. In the circuit transistor diagram shown, the terminals P, Q and R represent __________.
A. BASE, EMITTER, COLLECTOR
B. BASE, COLLECTOR, EMITTER
C. EMITTER, BASE, COLLECTOR
D. COLLECTOR, EMITTER, BASE
3. The resistance in a series R-C circuit is 5W. If the impedance of the circuit is 13 Ω, calculate the
reactance of the capacitor.
A. 18Ω
B. 16 Ω
C. 14 Ω
D. 12 Ω
Explanation:
.
4. An RLC circuit with R = 60Ω, L = 0.2H, C = 40mF and f = 392.86Hz experiences the passage of an a.c. with peak value 0.1A. Obtain the value of the current vector, VC.
A. 10.0V.
B. 15.0V.
C. 18.4V.
D. 12.0V.
5. Which of the following diagram represents correctly an n-p-n transistor?
A.
B.
C.
D.
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ELECTRIC FIELDS
1. Two plates capacitors are separated by a distance of 0.5m in a field at 107N/C.
[Take 1⁄4πeo = 9.05 × 109m/f].
Determine the power generated by the circuit.
A. 1.25 x 106W.
B. 26.73 x 104W.
C. 39.22 x 107W.
D. 1.38 x 108W
2. Two plates capacitors are separated by a distance of 0.5m in a field at 107N/C.
[Take 1⁄4πeo = 9.05 × 109m/f].
What is the current that could be generated if the system of circuit is left over a period of 10-5sec?
A. 10-3A.
B. 2.5×10-2A.
C. 27.62A.
D. 3.52A.
3. A current of 21A is passed through a 20m length of two conducting wire placed 125cm apart. Determine the force of attraction between the wires assuming the current is flowing in the direction.
[TAKE the force constant to be 2 x 10-7].
A. 1.33 x 10-5N
B. 4.5 x 10-5N
C. 7.1 x 10-4N
D. 6.4 x 10-4N
4. Two plates capacitors are separated by a distance of 0.5m in a field at 107N/C.
[Take 1⁄4πeo = 9.05 × 109m/f].
Obtain the possible resistance that could be applied across the capacitors.
A. 320.056KΩ.
B. 22.056KΩ.
C. 520KΩ.
D. 362.056KΩ
5. In the given circuit shown, the cell P has an e.m.f of 1.5V and an unknown internal resistance, r while the cell Q has an e.m.f. 2.0V and an internal resistance 1. If the ammeter reads 50mA, then R equals _______.
A. 3.0W
B. 4.0W
C. 5.5W
D. 2.0W
Explanation:
