The amplitude of a wave is the

A work of 30 joules is done is transferring 5 millicoulombs of charge from a point B to a point A in an electric Held. The potential difference between B and A is

• A. 1.7 x 10^-4V
• B. 3.4x10^-4V
• C. 1.5x10^-1V
• D. 6.0 x10³V

If the current in the resistor R in diagram below is 0.05A, calculate the p.d. across the inductor.

• A. 2.5V
• B. 25.0V
• C. 49.0V
• D. 50.0V

The force experienced by an object of mass 60.0kg in the moon's gravitational field is 1.002 x 10²N. What is the intensity of the gravitational field?

• A. 0.60Nkg^-1
• B. 1.67Nkg^-1
• C. 6.12 x 10²Nkg^-1
• D. 9.81ms^-2

The maximum power dissipated by a 100Ω resistor in a circuit is 4W. Calculate the voltage across the resistor

• A. 10V
• B. 20V
• C. 25V
• D. 400V

A beam consisting of \(\alpha\)-particles. \(\beta\)-particles and \(\gamma\)-rays pass through a magnetic field at right angles to the direction of the field. Which of the following observations would be made about the \(\alpha\)-particles, \(\beta\)-particles, and \(\gamma\)-rays respectively?

• A. Deflected, deflected, deflected
• B. Deflected, deflected, not deflected
• C. Deflected, not deflected, deflected
• D. Not deflected, deflected, deflected

The optical instrument which is suitable for viewing a nearby objects is ………..?

• A. Telescope
• B. sextant
• C. microscope
• D. periscope

Which of the following is true of an electrical charge?

• A. Positive charge means deficit electrons
• B. Negative charge means excess of electrons
• C. electric current means movement of electrons
• D. All of the above

To keep a vehicle moving at a constant speed v, requires power P, from the engine. The force provided by the engine is

• A. \(\frac{p}{v}\)
• B. \(\frac{1}{2}\) v
• C. pv
• D. \(\frac{p}{v^2}\) v

If a sound wave goes from a cold air region to a hot air region, its wavelength will

• A. increase
• B. decrease
• C. decrease then increase
• D. remain constant