Question
A current-carrying conductor placed in a magnetic field
experiences a force because:Solution
When a conductor carries current, it means that charges (typically electrons) are in motion inside the conductor. A magnetic field exerts a force on these moving charges , not on stationary ones. This force is given by the Lorentz force law : 
This interaction causes the entire conductor to experience a mechanical force when placed in a magnetic field.
Limonitic ore is the ore of which metal?Â
Which of the following is a compound?
Noise is measured in –
Which colour is the complementary colour of yellow?
A particle enters a uniform magnetic field at some angle other than 90° or 0° to the field. The path followed by the particle is:
Two layers of a cloth of equal thickness provide warmer covering than a single layer of cloth with double the thickness. Why?Â
The primary function of bile in digestion is to:
Which of the following is/are correct?
1. Displacement current can exist in vacuum
2. Magnetic field can exist without electric f...
The substance which conducts current in the solid state is –
‘Therm’ is the unit of –
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