Question
Let two chords AB and AC of the larger circle touch the
smaller circle having same centre at X and Y. Then XY = ?Solution
Ax = Ay tangent XB from ∆OXB = R²-r² = XB ---(1) YC from ∆OYC = R²-r²=YC ---(2) Ax = AY = R2 – r 2 -----(3) AY = YC and AX = XB by 1,2 and 3 that x and Y will be midpoint of AB & AC that means by thele’s theorm XY ‖ BC So, => xy = ½ BC
A coil takes 4 A from a 12 V DC source. When connected to a 12 V, 50 rad/s AC source, the current is 2.4 A. The inductance of the coil is:
Mirror formula is
Which law is violated if two bodies in mutual gravitational interaction exert unequal forces on each other?
Which lens is used to correct myopia (shortsightedness)? Â
An electron and a proton are accelerated by the same potential difference. Which one has a longer de Broglie wavelength?
A particle starts from rest and accelerates uniformly at 2 m/s² for 10 seconds, then moves with constant velocity for 5 seconds, and finally decelerat...
A transistor works as an amplifier only when:
In which medium can sound not travel?
Which of the following statements is true for a conductor in an electric field?
‘Lubb-dupp’ sound is produced due to the action of
Relevant for Exams:
