Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

JEE Class main Answered

The angle between two vectors -2i^+3j^+k^ and i^+2j^-4k^ is
Asked by Sunita | 06 Jun, 2019, 23:40: PM
answered-by-expert Expert Answer

CosQ= -2+6-4/root14.root21 

CosQ=0/root14.root21

CosQ=0

Q=90°

Answered by Shiwani Sawant | 07 Jun, 2019, 00:35: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
JEE main - Physics
what is the relation between drift velocity and mobility
Asked by ratchanavalli07 | 17 Sep, 2024, 07:46: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
A ball of mass m approaches a moving wall of infinite mass with speed v along the normal to the wall. The speed of the ball is u towards the ball. The speed of the ball after elastic collision with the wall is
Asked by yayashvadutta45 | 15 Sep, 2024, 19:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
a current of 2a is flowing through a conductor of length 22m bent in arc radius 5cm
Asked by adithireddy999 | 03 Sep, 2024, 09:35: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
two vectors vector a and vector B lie in one plane vector c lie in the different plane then vector a + vector b + vector c is
Asked by vaishalinirmal739 | 29 Aug, 2024, 18:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
What is impulse?
Asked by vradhysyam | 26 Aug, 2024, 17:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
what is u-v rule
Asked by kunalauditore94 | 21 Aug, 2024, 19:13: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
the block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant K and compresses it by length l.the maximum momentum of the body after collision is
Asked by karripaparao74 | 20 Aug, 2024, 23:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
in an ac circuit the RMS value of current Irms is related to the peak current Io by the relation
Asked by sachisajjan0 | 18 Aug, 2024, 21:31: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
The window of the fourth floor of GURUKUL building is 5 m high. A man looking out of the window sees an object moving up and down the height of window for 2 sec. Find the height that the object reaches from the top end of the window.
Asked by ramutejbhadur | 18 Aug, 2024, 09:04: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
source of electromagnetic waves
Asked by sakshikarn62 | 15 Aug, 2024, 20:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Customised test packs for Teachers, Parents, and Students. Click here for details!
×