Which of the following is a vector?

• A. Electric charge
• B. Electric field
• C. Electrical potential difference
• D. Electrical capacitance

The number of neutrons contained in the nucleus \(^{238}_{92}U\) is

• A. 92
• B. 146
• C. 238
• D. 330

Three cells each of e.m.f. 1.5v and an internal resistance of 1.0\(\Omega\) are connected in parallel across a load resistance of 2.67\(\Omega\). Calculate the current in the load?

• A. 0.26A
• B. 0.41A
• C. 0.50A
• D. 0.79A

Electrical power is transmitted at a high voltage rather than low voltage because the amount of energy loss is reduced due to

• A. heat dissipation
• B. production of eddy currents
• C. excessive current discharge
• D. excessive voltage distance

A stone of mass m kg is held h meters above the floor for 50s. The work done in joules over this period is

• A. mh
• B. mgh
• C. mgh/50
• D. O

When a known standard resistor of 2\(\Omega\) is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor?

• A. 1.10\(\Omega\)
• B. 1.64\(\Omega\)
• C. 2.44\(\Omega\)
• D. 27.50\(\Omega\)

A car moving with a speed of 90kmh-1 was brought uniformly to rest by the application of the brakes in 10s. How far did the car travel after the brakes were applied?

• A. 125m
• B. 150m
• C. 250m
• D. 15km

Which of the following is an essential physical property of the wires used for making fuses?

• A. low density
• B. high thermal conductivity
• C. low electrical resistivity
• D. low melting point

In a resonance tube experiment, the effective length of the air column for the first resonance is 20cm when set into vibration by a tuning fork of frequency 480Hz. Neglecting and effect, the velocity of sound in air is

• A. 96ms^-1
• B. 255ms^-1
• C. 340ms^-1
• D. 384ms^-1

What is the average velocity of the sprinter whose velocity time graph is as shown below

• A. 85.0ms^-1
• B. 17.0ms^-1
• C. 8.5ms^-1
• D. 1.7ms^-1