# SCC Education

## MAGNETIC EFFECTS OF ELECTRIC CURRENT HOTS Questions and Answers

MAGNETIC EFFECTS OF ELECTRIC CURRENT

Q.1 A straight wire carrying electric current is moving out of plane of paper and is perpendicular to it. What is the direction and type of induced magnetic field?

Q.2 How can it be shown that magnetic field exist around a wire carrying current?

Q.3 How can a solenoid be used to magnetise a steel bar.

Q.4 Why can’t two magnetic field lines ever intersect?

Q.5 Can a 5 A fuse be used in wire carrying 15 A current? Why?

Q.6 Give the factors that affect strength of magnetic field at a point due to a straight conductor carrying current.

Q.7 Where do we connect a fuse: with live wire or with neutral wire?

Q.8 Give two uses of electromagnets.

Q.9 Name any two devices which use permanent magnets.

Q.10 Draw the magnetic field lines representing uniform magnetic field.

Q.11 A current-carrying straight conductor is placed in the east-west direction. What will be the direction of the force experienced by this conductor due to earth’s magnetic field? How will this force get affected on? (a) reversing the direction of floe
of current (b) doubling the magnitude of current.

Q.12 An electron enters a magnetic field at right angles to it as shown in fig. The direction of the force acting on the electron will be: (a) to the right (b) to the left (c) out of the page (d) into the page
Q.13 Why is the earth pin thicker and longer than the live and the neutral pins?

Q.14 A coil of insulated copper wire is connected to a galvanometer. What would happen if a bar magnet is
(i) Pushed into the coil?
(ii) Withdrawn from inside the coil?
(iii) Held stationary inside the coil?

Physics for class 10.

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Magnetic-effects-of-electric-current
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