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0:01:53

A convex lens having focal length of 30 cm is placed in front of the object, which is located at 1 m

0:01:20

Following shows a ray of light as it travels from medium A to medium B, NN' is the normal...

0:03:28

An object of height 7.5 cm is placed in front of a convex mirror of radius of curvature of 25 cm...

0:01:43

How much time the minute hand of a clock will take to describe an angle of 2π/3 radians?

0:02:10

An object is placed at 10 cm in front of a concave mirror of radius of curvature 15 cm.

0:03:50

An object, 4.0 cm in size, is placed at 25.0 cm in front of a concave mirror of focal length 15.0 cm

0:03:23

A convex mirror used for rear-view on an automobile has a radius of curvature of 3.00 m.If a bus ...

0:00:41

The focal length of a concave mirror in air is f. If it is immersed in water (n=4/3) , then...

0:02:14

Dentists use small concave mirrors to see the teeth. If a mirror of focal length 3 cm is held...

0:02:05

A candle is held 3 cm away from a concave mirror whose of curvature is 24 cm. Where is the image...

0:02:07

A candle C is kept between two parallel mirrors, at a distance 0.2 d from the mirror 1.

0:01:24

Three equal resistors connected in series across a source of V voltage together dissipates 5W power.

0:04:24

Consider a simple circuit containing a battery and three identical incandescent bulbs A, B and C.

0:00:43

Given that the HCF(306, 657) = 9, find LCM(306, 657)

0:02:25

Find the LCM and HCF of the following integers by applying the prime factorisation method.

0:03:19

Find the LCM and HCF of following pairs of integers and verify that LCM*HCF = product of the nos.

0:03:39

Express each number as a product of its prime factors.

0:01:51

Use Euclid’s division lemma to show that the cube of any positive integer is of the form 9m...

0:02:21

Use Euclid’s division lemma to show that the square of any positive integer is either of the form...

0:02:24

Equivalent resistance between two points A and B in the circuit shown will be:

0:02:38

Spherical mirror produces magnification of +1.5 Explain the nature and size of image formed by it.

0:02:47

Virtual image three times size of object is obtained with concave mirror of radius curvature 36 cm

0:02:17

In the given figure, ∆ 𝑂𝐷𝐶~∆ 𝑂𝐵𝐴, ∠𝐵𝑂𝐶=115° and ∠𝐶𝐷𝑂=80°. Then ∠𝑂𝐴𝐵 is equal to:-

0:01:47

Value of 𝒕𝒂𝒏⁡𝟐𝟓° 𝒕𝒂𝒏⁡𝟑𝟓° 𝒕𝒂𝒏⁡𝟒𝟓° 𝒕𝒂𝒏⁡𝟓𝟓° 𝒕𝒂𝒏⁡𝟔𝟓° is : a) 𝟎 b) 𝟏 c) √𝟐 d) √𝟑