Physics Past Questions and Answers

A 10\(\mu\)C charge moves with a velocity of 1.0 x 105 ms-1 at right angle to a uniform magnetic field of flux density 5.0 x 10-4T. Calculate the force on the charge

A 5.0 x 10-5N
B 5.0 x 10-4N
C 5.0 x 105N
D 5.0 x 106N

Question 3942:

Which of the following statements is not correct about steel and soft iron?

A Steel is more magnetized than soft iron
B Permanent magnets are usually made of steel
C Soft iron is more readily magnetized than steel
D Soft iron more readily loses its magnetism than steel

Question 3943:

What determines the polarity at the ends of an electromagnet? The

A Magnitude of the current passing through the wire
B Material of the core of the magnet
C Material of the coil
D Direction of current in the wire

Question 3944:

How many beta particle(s) are emitted in the radioactive decay of \(^{198}_{79}Au \leftarrow ^{198}_{80}Hg\)?

Question 3945:

The phenomenon by which two light atomic nuclear combine to form a heavy nuclide with the release of energy is known as

A Radioactivity
B Nuclear fusion
C Nuclear fission
D Chain reaction