Recent questions tagged magnetic effect of current

+1 vote

1 answer

Copy the given diagram of a transformer and complete it. Name the parts A and B.

asked Apr 7, 2019 in Class 10 by kratos

+2 votes

1 answer

A rectangular loop of sides 10 cm and 5 cm carrying a current I of 12 A is placed in different orientations as shown in the figures below.

asked Apr 3, 2019 in JEE by kratos

+1 vote

1 answer

How are the e.m.f in the primary and secondary coils of a transformer related with the number of turns

asked Apr 2, 2019 in Class 10 by kratos

+1 vote

1 answer

Two particles X and Y having equal charges, after being accelerated through the same potential difference,

asked Apr 2, 2019 in JEE by kratos

+1 vote

1 answer

The adjacent diagram shows a small magnet placed near a solenoid AB. Current is switched on

asked Apr 1, 2019 in Class 10 by kratos

+2 votes

1 answer

For a vibration magnetometer, the time ****** of suspended bar magnet can be reduced by -

asked Mar 30, 2019 in Class 12 by kratos

+3 votes

1 answer

You have been provided with a solenoid AB. 1. What is the polarity at end A?

asked Mar 27, 2019 in Class 10 by kratos

+2 votes

1 answer

Electromagnets are made of soft iron because soft iron has (a) high retentivity and high coercive force

asked Mar 27, 2019 in Class 12 by kratos

+3 votes

1 answer

An equilateral triangular frame PQR of mass 2kg and side 1m is at rest under the influence of horizontal magnetic field 10T

asked Mar 26, 2019 in JEE by kratos

+3 votes

1 answer

Needles N1 , N2 and N3 are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively.

asked Mar 26, 2019 in JEE by kratos

+1 vote

1 answer

What will be the resultant magnetic field at origin due to four infinite length wires. If each wire produces magnetic field 'B' at origin

asked Mar 25, 2019 in JEE by kratos

+2 votes

1 answer

State two advantages of an electromagnet over a permanent magnet.

asked Mar 22, 2019 in Class 10 by kratos

+1 vote

1 answer

Draw a labelled diagram to show how an electromagnet is made.

asked Mar 22, 2019 in Class 10 by kratos

+2 votes

1 answer

A long straight wire of radius "a" carries a steady current I the current is uniformly distributed across its cross-section.

asked Mar 20, 2019 in Class 12 by kratos

+3 votes

1 answer

An electron *** sends electrons through a region with an electric field of 1.5 × 10^4 N/C for a distance of 2.5 cm.

asked Mar 18, 2019 in Physics by kratos

+1 vote

1 answer

A wire bent into a circle carries current in an anticlockwise direction. What polarity does this face of the coil exhibit?

asked Mar 15, 2019 in JEE by kratos

+2 votes

1 answer

Due to the presence of the current I1 at the origin.

asked Mar 14, 2019 in JEE by kratos

+2 votes

1 answer

State two factors on which the strength of induced e. m.f. depends.

asked Mar 14, 2019 in Class 10 by kratos

+3 votes

1 answer

If magnetic field is along +ve z-axis and a potential difference is applied across an ionized

asked Mar 13, 2019 in JEE by kratos

+3 votes

1 answer

Ionized hydrogen atoms and α-particles with same momenta enters perpendicular to a constant magnetic field, B.

asked Mar 12, 2019 in Class 12 by kratos

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