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Which of the following is used as lubricant

Which of the following is used as lubricant? coke diamond graphite charcoal The correct option is iii. graphite... View Article

Write symbol of gold

The symbol of gold is Au which means Aurum. This is a Latin word for gold.... View Article

A car moving along a straight highway with speed of 126 km/h is brought to a stop within a distance of 200 m. What is the retardation of the car and how long does it take for the car to stop?

Given: u = 126 km/h = 126x5/18 m/s = 35 m/s v = 0 s = 200 m Using Newton's equation of motion,... View Article

Draw a labelled diagram of the mature embryo sac of angiosperms

The following is a labelled diagram of the mature embryo sac of angiosperms:... View Article

Assertion: The electrical resistance of a column of 0.05 M NaOH solution of diameter 1 cm and length 50 cm is 5.55×10³ Ohm. Reason: Its resistivity is equal to 76.234 Ohm-cm

Assertion: The electrical resistance of a column of 0.05 M NaOH solution of diameter 1 cm and length 50 cm is... View Article

The range of sec^-1 x is

The range of sec-1x is: y=sec-1x x=sec y Here, x≤1 or x≥1 The domain includes all numbers... View Article

A rectangular wire loop of sides 8 cm and 2 cm with a small cut is moving out of a region of uniform magnetic field of magnitude 0.3T directed normal to the loop. What is the emf developed across the cut if the velocity of the loop is 1 cm/s in a direction normal to the (a) longer side (b) shorter side of the loop? For how long does the induced voltage last in each case?

Length of the rectangular wire, l = 8 cm = 0.08 m Width of the rectangular wire, b = 2cm = 0.02 m Therefore, area of the rectangular loop, A = lb... View Article

Every counting number has an infinite number of

Every counting number has an infinite number of? prime factors multiples factors none of these The correct option is ii. multiplies... View Article

Assertion: 1 Faraday = 96500 Coulombs It is a charge of 1 mole electrons. Reason: 1 Faraday charge liberates one gram equivalent of substance at an electrode.

Assertion: 1 Faraday = 96500 Coulombs It is a charge of 1 mole electrons. Reason: 1 Faraday charge liberates one gram equivalent of substance... View Article

Solve 2cos^2x + 3sinx = 0

Given: To solve: 2cos2x+3sinx=0 Solution: 2[1-sin2x]+3sinx=0... View Article

Solute A is a ternary electrolyte and solute B is a none-electrolyte. If 0.1 M solution of solute B produces an osmotic pressure of 2P, then 0.05 M solution of A at the same temperature will produce an osmotic pressure equal to?

Ternary electrolyte implies the van't Hoff factor is 3 Osmotic pressure,π=CRTxi Solute A is ternary, i = 3 C=0.05M Solute B is a... View Article

The half life period for a first order reaction is

The half life period for a first order reaction is? inversely proportional to the square of the concentration inversely proportional to... View Article

25:125::36:?

25:125::36:? 318 180 206 216 The correct option is iv. 216... View Article

Draw the graph of each of the following equations.

Draw the graph of each of the following equations. x=4 x+4=0 y=3 y=-3 x=-2 x=5 y+5=0 y=4... View Article

How does the resistance of a conductor depend on a) length of the conductor? b) area of cross-section of the conductor? c) temperature of the conductor?

Solution: a) Resistance of a conductor increases or decrease with an increase or decrease in the length of the conductor. b) Resistance of a... View Article

A body travel uniformly a distance (13.8+0.2) m in a time (4+0.3)s. Find the velocity of the body within error limits and the percentage error.

V=distance/time = 13.8/4 = 3.45 Δv/v = Δd/d+Δt/t = 0.2/13.8 + 0.3/4 = 0.089 ΔV = 0.089x3.45 = 0.30 Therefore,... View Article