# AIEEE, IIT-JEE Physics - Current Electricity - 2 Online Test

The amount of charge Q passed in time t through a cross-section of a wire is Q = 5t2 + 3t + 1. The value of current at time t = 5 s is
9 A
49 A
53 A
none of these
Three charges each of +1?C are placed at the corners of an equilateral triangle. If the force between any two charges be F, then the net force on either charge will be
2 F
3 F
Given that q1 + q2 = q. For what ratio q1/q will the force between q1 and q2 be maximum?
0.25
0.5
1
2
An insulated sphere of radius R has charge density ?. The electric field at a distance r from the centre of the sphere (r < R)
Two point charges +3?C and +8?C repel each other with a force of 40 N. If a charge of –5?C is added to each of them, then the force between them will become
–10 N
+10 N
+20 N
–20 N
Two point charges exert on each other a force F when they are placed r distance apart in air. When they are placed R distance apart in a medium of dielectric constant K, they exert the same force. The distance R equals:
r K
Two conducting spheres of radii r1 and r2 are at the same potential. The ratio of the their charges is
r1/r2
r2/r1
Two conducting spheres of radii r1 and r2 are equally charged. The ratio of their potential is
r1/r2
r2/r1
An electron of mass ‘m’ and charge ‘e’ is accelerated from rest through a potential difference ‘V’ in vacuum. Its final speed will be
eV / 2m
eV/m
A large insulated sphere of radius ‘r’ charged with ‘Q’ units of electricity is placed in contact with a small insulated sphere of radius r' and is then separated. The charge on smaller sphere will now be
Q (r + r)
Q (r + r')
The electric potential V is given as a function of distance x (metre) by V = (5x2 + 10x – 4) volt. Value of electric field at x = 1 m is
–23 V/m
11 V/m
6 V/m
–20 V/m
A straight wire of length l and electric dipole moment p is bent to form a semicircle. The new dipole moment would be
p/2
p/2?
2p

Q, 2Q

C
2 C
3 C
4 C

10(
20(
30(
40(
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AIEEE, IIT-JEE Physics - Current Electricity - 2

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Discussion

760 days 22 hours 24 minutes ago

dan ketertahanan terhadap pengaruh luar (korosi, aus, bahan kimia, suhu tinggi dan sebagainya).
Besi teknis selalu tercampur dengan unsure-unsur lain misalnya karbon (C), silicon (Si), mangan (Mn), Fosfor (P), dan belerang http://goo.gl/TLJKhQ http://bit.ly/2bgLGS7

1870 days 20 hours 43 minutes ago

natrium, dan barium.
Logam mulia : http://goo.gl/zhFEpe http://bit.ly/2bF0zgB
emas, perak, dan platina.
Logam tahan api : wolfram, molibden, titanium, dan zirkonium.
Dalam penggunaan serta pemakaiannya, logam pada umumnya tidak merupakan

1870 days 20 hours 45 minutes ago

1912 days 21 hours 41 minutes ago

how to crack 15 th ques?

2087 days 22 hours 41 minutes ago

IT is easy as compared to iit

2161 days 22 hours 2 minutes ago

how to solve mltiply question in short cut

2193 days 15 hours 35 minutes ago

its easy. And actually it was nothing as compared to iit jee level.

2524 days 10 hours 27 minutes ago

nice test .......but I want topic wise mock tests in maths physics and chemistry leveling IIT JEE standards

2538 days 18 hours 38 minutes ago

nice test... i tried my best

2568 days 10 hours 57 minutes ago

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