Which one of the following statements about ∝ particles is NOT true?
A 10 V battery delivers a steady current of 2 A. How long will it be before 1.0 kJ of energy is supplied to the circuit?
In which one of the following four cases would the pressure be greatest?
In Fleming's Left Hand Rule describing the motor effect, the directions are:
Which one of the following statements about a voltmeter is NOT true?
A detector close to a sample of radioactive material records 76 counts per second (cps). Precisely 2 days later the count rate has fallen to 22 cps.The count rate due to background radiation, taken immediately before and after the experiment, averaged 4 cps. The half-life of the material is:
A certain nucleus has 12 protons and 16 neutrons.Which one of the following statements about the nucleus is NOT true?
A loudspeaker emits a steady note.A girl sings a note which is of lower pitch but higher volume. The sound wave she is producing has:
Which one of the following statements about an ammeter is NOT true?
The units of specific latent heat are:
Which one of the following statements about diffraction is true?
Which one of these statements is true for ALL electromagnetic waves?
The specific heat capacity of a particular liquid is 3000 J kg-1 K-1. A large beaker containing 2 kg of the liquid has to be warmed from 25 ℃ to 35 ℃. A 100 W heater is used. If all the thermal energy could be transferred to the liquid, how long would it take?
A spring is 100 mm long when unstretched. A 40 N load is hung from it, and its total length increases to 120 mm. A different load on the spring causes it to become 150 mm long. If the spring obeys Hooke′s Law, this second load is:
Which one of the following is NOT a magnetic material?
The existence of a neutral particle named the neutron was first confirmed experimentally by:
A boy throws a cricket ball straight up in the air. At the very top of its flight:
Sweating can help to cool the body. This cooling is achieved mainly by:
A girl whose weight is 250 N walks up a slope 40 m long onto a platform 3 m high. Her gain in gravitational potential energy is:
The following statements describe an ordinary mercury-in-glass laboratory thermometer. Which one of them is NOT true?
You look through a microscope to view the Brownian motion of smoke in a container of air. Which one of the following statements is NOT true?
The following statements describe the molecules in a gas at around room temperature. Which one is NOT true?
The lowest and the highest frequencies a typical young person′s ear can detect are approximately:
What would be the best materials to use for making the coil and the core of an electromagnet?
Which one of the following statements about constructive interference is NOT true?
The nucleus of a carbon atom has six protons and eight neutrons.Which one of the following describes it?
The method by which certain uranium and plutonium nuclei can release energy in a reactor is known as:
The following statements refer to the laminated core of a transformer. Which one of them is NOT true?
When we focus on a near object, the lens in our eye:
Which one of the following would NOT give rise to a systematic error in an experiment?
The following statements describe a magnetic field plot, showing the lines of force.Which one is true?
The graph shows the results of an experiment to investigate
the relationship between the voltage placed across a light bulb
and the current which then flows through it.Which one of the
following statements is NOT true?
Two separate forces are acting on a bar to cause it to rotate clockwise. One force is 20 N, at a distance of 3 m out from the pivot; the second force, 2 m further out, is 10 N. Their combined moment is:
The splitting of a beam of white light into the colours which make it up is called:
A ripple travels over the surface of some water. Its wavelength is 2 m, its amplitude is 0.1 m and its frequency is 0.5 Hz.The speed of the ripple is:
When a metal wire carries an electric current, charges flow through it.The moving charges are:
A dynamo connected to a circuit is being turned.Which one of the following would NOT generate a greater e.m.f.?
A force of 100 N starts to act on a body of mass 20 kg which is initially at rest. After 10 s its velocity will be:
The statements refer to a fuse. Which one is true?
A lens forms a real image of magnification ×3.Which one of the following statements is NOT true?
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