### Ask Your question

### Search & Filtering

A 9V battery is short-circuited. The potential difference across the battery is found to be 8V, and the current is 5A. What is the internal resistance of the battery?

0.1Ω

0.2Ω

0.3Ω

0.4Ω

0.1Ω

0.2Ω

0.3Ω

0.4Ω

Answered! |

Ohm's law relates potential difference with?

power

Energy

current

time

power

Energy

current

time

Answered! |

IF line(OA) =4i + 3j, line(OB) = 6i - 2j and line(OC) =2i - j . Deduce the length of the triangle CA.

13−−√

20−−√

√29

√17

13−−√

20−−√

√29

√17

Answered! |

What quantity have both magnitude and direction ?

vector

scalar

mass

dot product

vector

scalar

mass

dot product

Answered! |

Find the vector product axb. If a = i + 2j - k and b = 2i + 3j + k

5i - 3j - k

2i - 4j - k

3i + j - k

I - j + 3k

5i - 3j - k

2i - 4j - k

3i + j - k

I - j + 3k

Answered! |

A ...... is the sum of two vectors.

resultant vector

free vector

null vector

position vector

resultant vector

free vector

null vector

position vector

Answered! |

A temperature of 100^0C is a ...... quantity.

force

scalar

vector

magnitude

force

scalar

vector

magnitude

Answered! |

Sally travels by car from one city to another. She drives for 29.0 min at 67.0 km/h, 52.0 min at 46.0 km/h, and 19.0 min at 76.0 km/h, and she spends 9.0 min eating lunch and buying gas.

Answered! |

If n balls hits elasticity and normally on a surface per unit time and all balls of mass m are moving with same velocity u, then force on surface is

(1) mun

(2) 2mun

(3) 1/2mun

(4)mu^2n

(1) mun

(2) 2mun

(3) 1/2mun

(4)mu^2n

Answered! |

A particle of mass mass m strikes a wall with speed v at an angle 30 degree with the wall. The magnitude of impulse imparted to ball by wall is

(1) mv

(2) mv/2

(3) 2mv

(4) squareroot(3)mv

(1) mv

(2) mv/2

(3) 2mv

(4) squareroot(3)mv

Answered! |