physics

Which of the following is a wind instrument?

A. Guitar B. Organ C. Violin D. Piano E. Harp Correct Answer: Option B - Organ

5 years ago

Calculate the current in the 30 resistor in the diagram below if the battery is of negligible internal resistance

A. 0.3A B. 0.4A C. 1.0A D. 1.5A E. 2.5A Correct Answer: Option C - 1.0A

5 years ago

What is the potential difference between X and Y in the diagram below if the battery is of negligible internal resistance

A. 12.5V B. 5.8V C. 5.0V D. 3.0V E. 2.0V Correct Answer: Option D

5 years ago

Calculate the quantity charge flowing through a conductor if a current of 10A passes through the conductor for 10s.

A. 100C B. 20C C. 15C D. 10C E. 1C Correct Answer: Option A - 100C

5 years ago

The effective capacitance between points X and Y in the diagram below is 1.0μF. What is the value of the capacitance C, measured in micro-farad?

A. 5.0μF B. 4.0μF C. 3.0μF D. 1.0μF E. 0.5μF Correct Answer: Option D - 1.0μF

5 years ago

The energy stored in a capacitor of capacitance 5μF is 40J. Calculate the voltage applied across its terminals?

A. 4000V B. 200V C. 16V D. 6V E. 4V Correct Answer: Option A - 4000V Explanation  E=CV²/2 V²=2/EC V²=…

5 years ago

A capacitor of capacitance 25μF is connected to an a.c. power source of frequency 200 Hz. Calculate the reactance of the capacitor?

A. 0.01 B. 0.02 C. 50.00 D. 100.00 E. 200.00. Correct Answer: Option D - 100.00

5 years ago

Calculate the inductive reactance of the circuit shown below?

A. 50.00 B. 5.00 C. 0.50 D. 0.05 E. 0.02 Correct Answer: Option A - 50.00

5 years ago

Calculate the inductance L of the coil in the circuit shown below.

A. 14.4H B. 3.8H C. 0.6H D. 0.4H E. 0.2H Correct Answer: Option C - 0.6H

5 years ago

What is the escape velocity of a body on the surface of the earth of radius R if the gravitational constant is G and the mass of the earth is M? (Neglect energy losses to the surroundings)

A. 2GR B. 2G/R C. 2GR² D. 2GM/R Correct Answer: Option D - 2GM/R

5 years ago
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