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Start learning 50% faster. Sign in nowLet the speed of the current be x kmph. According to the question, 9/(9 – x) = 2 ⇒ 18 – 2x = 9 ⇒ 2x = 18 – 9 ⇒ x = 9/2 = 4.5 km/hr
According to Maxwell’s right-hand thumb rule, the direction of magnetic field lines around a current-carrying wire is indicated by the:
Which function is performed by rectifiers?
Temperature of the Sun is measured by
Which one of the following is used to remove Astigmatism for a human eye?
Who among the following is credited with the discovery of X-rays?
One Astronomical Unit (AU) is the average distance between-
The acceleration due to gravity ___________ with height
Which material has the lowest refractive index?
Bronze is an alloy of-
A concave lens has a focal length 15 cm. If the object is placed at 30 cm from the lens, what is the image distance?