Class X Science
Subject: Physics
Magnetic Effects of Electric Current
Q. 1. SI unit of magnetic field strength is (A) Oersted
(B) Ampere
(C) Volt
(D) Ohm
Q. 2. Inside the magnet the field lines run
(A) From south to north
(B) Away from north pole
(C) From north to south
(D) Away from the south pole
Q. 3. The magnetic field strength of a solenoid can be increased by inserting
(A) A wooden piece into it
(B) An iron piece into it
(C) A glass piece into it
(D) Paper roll into it
Q. 4. Strength of the magnetic field at a point in the space surrounding the magnet is measured by
(A) Thickness of the magnet
(B) The resistance of it
(C) The number of lines crossing a given point
(D) Length of the magnet
Q. 5. The magnetic field inside the solenoid is
(A) Non uniform
(B) Variable
(C) same at all points
(D) zero
Q. 6. At the time of short circuit , the current in the circuit
(A) Reduces instantaneously
(B) Increases heavily
(C) Does not change
(D) Vary continuously
Q. 7. Device used to test whether the current is flowing in a conductor or not is
(A) Ammeter
(B) Voltmeter
(C) Galvanometer
(D) Battery
Q. 8. The process of Inducing current in a coil of wire by placing it in a region of changing magnetic field is
(A) Electrical effect
(B) Heating effect
(C) Magnetic effect of current
(D) Electromagnetic induction
Q. 9. The frequency of power supply used in India is
(A) 70Hz
(B) 50Hz
(C) 60 Hz
(D) 30Hz
Q. 10. Which of the following property of proton will change while it moves freely in a magnetic field
(A) Mass
(B) Speed
(C) Velocity
(D) Momentum
0 Comments