Physics Mock 2019

Question 1 of 50

A transducer is a device that

Question 2 of 50

A microphone converts

Question 3 of 50

The charge on a neutron is

Question 4 of 50

Which of these is a vector quantity?

Question 5 of 50

The unit of capacitance is the

Question 6 of 50

A lightning conductor protects buildings by

Question 7 of 50

Which radiation is stopped by a sheet of paper?

Question 8 of 50

The radiation with the greatest penetrating power is

Question 9 of 50

The strength of an electromagnet increases if you

Question 10 of 50

An electric bell uses

Question 11 of 50

A coil that produces a magnetic field like a bar magnet when current flows is a

Question 12 of 50

In a transverse wave, particles vibrate

Question 13 of 50

Sound is an example of a

Question 14 of 50

The force on a 2 C charge in a field of 50 N/C is

Question 15 of 50

Field lines of an electric field point from

Question 16 of 50

Gaps are left between railway lines to

Question 17 of 50

Splitting a heavy nucleus into lighter nuclei is

Question 18 of 50

The energy of the sun comes from

Question 19 of 50

Einstein's mass–energy equation is

Question 20 of 50

A thermistor's resistance (NTC type) decreases when its

Question 21 of 50

In an n-type semiconductor, the majority charge carriers are

Question 22 of 50

Rutherford's gold-foil experiment showed that the atom

Question 23 of 50

The dimensions of force are

Question 24 of 50

A spring of force constant 200 N/m is stretched 0.1 m. The force applied is

Question 25 of 50

The heat needed to change 1 kg of a solid to liquid at its melting point is the

Question 26 of 50

Energy needed to melt 2 kg of ice at 0 °C (L = 3.36 × 10⁵ J/kg) is

Question 27 of 50

A capacitor of 5 μF is charged to 10 V. The charge stored is

Question 28 of 50

The minimum energy needed to remove an electron from a metal surface is the

Question 29 of 50

The magnetic field around a straight current-carrying wire forms

Question 30 of 50

The period of a wave of frequency 20 Hz is

Question 31 of 50

Electric field strength is measured in

Question 32 of 50

A cathode ray oscilloscope can be used to

Question 33 of 50

A bimetallic strip bends when heated because the two metals

Question 34 of 50

Water has its maximum density at

Question 35 of 50

Kirchhoff's first law states that at a junction

Question 36 of 50

The method of mixtures assumes that

Question 37 of 50

Charge stored on a 4 μF capacitor connected to 12 V is

Question 38 of 50

A light-year is about

Question 39 of 50

A 2 kW immersion heater boils 1 kg of water at 100 °C away to steam (L = 2.26 × 10⁶ J/kg). The time taken is

Question 40 of 50

A parallel-plate capacitor's capacitance increases when

Question 41 of 50

The energy of a photon of frequency 5 × 10¹⁴ Hz is (h = 6.6 × 10⁻³⁴ J s)

Question 42 of 50

In nuclear equations, beta-minus emission increases the atomic number by 1 because

Question 43 of 50

A car of mass 1,000 kg rounds a bend of radius 50 m at 10 m/s. The friction force needed is

Question 44 of 50

A body on a rough plane begins to slide when the plane is tilted to 30°. The coefficient of static friction is

Question 45 of 50

An electron moving at 10⁶ m/s perpendicular to a 0.01 T field experiences a force of (e = 1.6 × 10⁻¹⁹ C)

Question 46 of 50

An open pipe of length 0.5 m has a fundamental frequency of (v = 340 m/s)

Question 47 of 50

The speed of a wave on a string increases when

Question 48 of 50

A brass ring of diameter 4.99 cm at 20 °C is heated to fit a 5.00 cm rod. If α = 2 × 10⁻⁵ /K, the temperature rise needed is about

Question 49 of 50

In a loop with e.m.f.s 12 V and 4 V opposing each other and total resistance 4 Ω, the current is

Question 50 of 50

The maximum energy of X-ray photons from a tube at 50 kV is