Question Library — KalmiPrep by Kalmitech

Physics UTME / JAMB 1988 Electricity and Magnetism

The principle of operation of an induction coil is based on

A

Ohm's law

B

Amphere's law

C

Faraday's law

D

Columbs law

medium Difficulty

Physics UTME / JAMB 1988 Electricity and Magnetism

In the circuit diagram above, the ammeter reads a current of 3A when R is 5 ohms and 6A when R is 2ohms, the value of the unknown resistance X is

Attached Figure / Diagram

A

1

B

2

C

3

D

4

medium Difficulty

Physics UTME / JAMB 1988 Electricity and Magnetism

A particle is injected perpendicularly into an electric field, it travels along a curved path as depicted in the image above,the particle is

Attached Figure / Diagram

A

gamma ray

B

electron

C

neutron

D

proton

medium Difficulty

Physics UTME / JAMB 1987 Electricity and Magnetism

The direction of the magnetic field at a point in the vicinity of a bar magnet is

A

always towards the north pole of the magnet

B

always away from the south pole of the magnet

C

along the line joining the point to the neutral point

D

in the direction the north pole of a compass needle would point

medium Difficulty

Physics UTME / JAMB 1987 Electricity and Magnetism

A galvanometer of resistance 20\(\Omega\) is to be provided with a shunt that \(\frac{1}{10}\) of the whole current in a circuit passes through the galvanometer. The resistance of the shunt is

A

2.00\(\Omega\)

B

2.22\(\Omega\)

C

18.00\(\Omega\)

D

18.22\(\Omega\)

medium Difficulty

Physics UTME / JAMB 1987 Electricity and Magnetism

In the above, a voltage V is applied across the terminals P and Q. The voltage across the 1 ohm resistor is

Attached Figure / Diagram

A

V/8

B

V/4

C

V/3

D

V/2

medium Difficulty

Physics UTME / JAMB 1987 Electricity and Magnetism

In the fig above, M and N are insulated metal spheres in contact. A negatively charged ebonite rod P is I brought near M. When M and N are Separated and the rod is taken away, which of the following statements is correct

Attached Figure / Diagram

A

both M and N have acquired negative charges

B

both M and N have acquired positive charges

C

M has acquired negative charge and N positive charge

D

N has acquired negative charge and M positive charge

medium Difficulty

Physics UTME / JAMB 1986 Electricity and Magnetism

Which of the following is NOT a part of a d.c. electric motor?

A

Field-magnet

B

Armature

C

Commutator

D

Transformer

medium Difficulty

Physics UTME / JAMB 1986 Electricity and Magnetism

The angle between the magnetic meridian and the geographic meridian at a locality on the earth is the

A

longitude of the locality

B

angle of inclination at the locality

C

latitude of the locality

D

angle of declination of the locality

medium Difficulty

Physics UTME / JAMB 1986 Electricity and Magnetism

The sign of the change on a charged glass rod may be determined with

A

a charged electroscope

B

an uncharged electroscope

C

a galvanometer

D

an electrometer

medium Difficulty

Physics UTME / JAMB 1986 Electricity and Magnetism

In fig 9 the value of R is

Attached Figure / Diagram

A

3Ω

B

4Ω

C

5Ω

D

6Ω

medium Difficulty

Physics UTME / JAMB 1986 Electricity and Magnetism

if the fig above E is an accumulator with negligible internal resistance. and the EMF 9.0V, The the total current is

Attached Figure / Diagram

A

0.3A

B

0.8A

C

1.0A

D

1.8A

medium Difficulty

Physics UTME / JAMB 1985 Electricity and Magnetism

Which of the following types of motion are oscillatory? i.a diving board when used by a diver. ii. the motion of the balance wheel of a wrist watch. iii. the motion of the turn-table of a record player. iv. the motion of the center of a ten kobo piece as it rolls down an inclined plane. v. the motion of the needle of a D.C. ammeter into which a low A.C. current is passed

A

i and ii

B

i, ii and iii

C

ii, ii and iv

D

i, ii and v

E

iii, iv and iv

medium Difficulty

Physics UTME / JAMB 1985 Electricity and Magnetism

A charge of one coulomb liberates 0.0033g of copper in an electrolytic process. How long will it take a current of 2A to librate 1.98g of copper in such a process?

A

5 mins

B

30 mins

C

50 mins

D

60 mins

E

120 mins

medium Difficulty

Physics UTME / JAMB 1985 Electricity and Magnetism

A cell gives a current of 0.15A through a resistance of 8\(\Omega\) and 0.3A. When the resistance is changed to 3\(\Omega\) the internal resistance of the cell is

A

0.05\(\Omega\)

B

1.00\(\Omega\)

C

1.50\(\Omega\)

D

2.00\(\Omega\)

E

2.50\(\Omega\)

medium Difficulty