+91-8076753736 [email protected]

-->

Current Electricity

Question

Wired Faculty App

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along direction of fields, then the electron

speed will decrease

speed will increase

will turn towards the left of the direction of motion

will turn towards the right of direction a motion

Solution

A.

speed will decrease

Field B is not applied only force. Field E will apply a force opposite to velocity of the electron hence, speed will decrease.

Some More Questions From Current Electricity Chapter

What conclusion can you draw from the following observations on a resistor made of alloy manganin?

Current A

Voltage V

Current A

Voltage V

0.2

0.4

0.6

0.8

1.0

2.0

3.94

7.87

11.8

15.7

19.7

39.4

3.0

4.0

5.0

6.0

7.0

8.0

59.2

78.8

98.6

118.5

138.2

158.0

Answer the following questions:
A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor: current, current density, electric field, drift speed?

Answer the following questions:
Is Ohm’s law universally applicable for all conducting elements? If not, give examples of elements which do not obey Ohm’s law.

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation