NCERT Science Class 10 Chapter 13 Magnetic Effects of Electric Current CBSE Board Sample Problems Very Short Answer
Get top class preparation for CBSE right from your home: fully solved questions with step-by-step explanation- practice your way to success.
Question
How can you say that the magnetic field is uniform inside the solenoid?
Solution
Because field lines are parallel inside the solenoid.
Question
Name any two devices which use permanent magnets.
Solution
Loudspeakers, (Galvanometer, voltmeter).
Question
Where do we connect a fuse: with live wire or with neutral wire?
Solution
It is always connected with live wire.
Question
To which wire do you connect fuse wire in a house hold circuit
Solution
With live wire
Question
What is the function of a fuse in the domestic electric circuit?
Solution
A fuse (or fuse wire) is used to protect the electric circuit in case of short- circuiting of circuit or in case of overloading of the circuit
Question
On what factors does the magnitude of force experienced by a current-carrying conductor placed normally in a magnetic field depends
Solution
The force depends on
(i) Current flowing in the conductor,
(ii) Length of the conductor,
(iii) Strength of magnetic field and
(iv) Orientation of the conductor
Question
What happens to the magnetic field lines due to a current carrying conductor when the current is reversed?
Solution
The direction of magnetic field (and magnetic field liens) gets reversed on changing the direction of flow of current in a straight conductor
Question
What is the direction of magnetic field lines of a magnet?
Solution
From N-pole to S-pole outside the magnet, and from S-pole to N-pole inside a magnet
Question
Name the rule which is used to find the direction of induced current in any circuit.
Solution
Fleming’s Right hand rule.
Question
What is the role of green colored wire in the three pin devices in domestic connections?
Solution
The green colored wire is used as the Earth wire, which helps in transferring the excess current to the earth and protects the user from any electrical shock.
Question
Mention the frequency and voltage we receive at our homes.
Solution
Frequency = 50 Hz,
Voltage = 220 V
Question
Name the material used to make core of electromagnets.
Solution
Soft iron.
Question
Why two magnetic field lines cannot intersection?
Solution
Because at the point of intersection a new direction can be set which is practically not possible / At the point of intersection two directions can be set which cannot be detected with the help of a compass.
Question
Name any one factor on which magnetic field strength of solenoid depends on?
Solution
Number of turns / Current
Question
Rahul observed in an experiment that when a current carrying conductor in placed in direction perpendicular to the direction of magnetic field, conductor starts displacing from its original position, State the rule applicable. What will happen if conductor is placed parallel to the direction of magnetic field?
(1/2+1/2)
Solution
Fleming’s left-hand Rule (state) (1/2)
No force will act on conductor if placed parallel. (1/2)