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Maths-

General

Easy

Question

The number of ways in which 5 different balls can be placed in three different boxes so that no box remains empty -

243
150
153
None of these

The correct answer is: 150

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The number of ways in which n distinct objects can be put into two identical boxes so, that no box remains empty is-

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In a hall there are 10 bulbs and their 10 buttons. In how many ways this hall can be enlightened?

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The equation $cos invisible function application x plus sin invisible function application x equals 2$ has

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A coil self inductance L = 0.04 H and resistance R = 12 $blank capital omega$ , connected to 220 V, 50Hz supply, what will be the current flow in the coil?

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When the speed of a dc motor increases the armature current

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A current carrying solenoid is approaching a conducting loop as shown in the figure. The direction of induced current as observed by an observer on the other side of the loop will be

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A step up transformer connected to a $220 blank V blank A C$ line is to supply $22 blank k V$ a neon sign in secondary circuit. In primary circuit a fuse wire is connected which is to blow when the current in the secondary circuit exceeds $10 blank m A$ . The turn ratio of the transformer is

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