Doubtly
@Doubtly · Joined Feb 2021
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- What are Grouping and Nesting in CSS? Grouping is used for giving the same properties to different selectors without repeating them. It is useful for reducing code by grouping se... 1
- What are the differences between HTML and CSS? HTML is also known as HyperText Markup Language. It is basically a markup language that can be used for developing web documents, websites,... 1
- What is the main difference between CSS and CSS3? CSS allows developers to give styling to web pages. You can select color, layout, fonts, and backgrounds. CSS3 stands for Cascading Style Sh... 1
- What are some of the disadvantages of CSS? One of the main disadvantages that developers face when using CSS is that it is available at different levels. This causes confusion, especi... 1
- What are some of the advantages of using CSS? CSS plays a critical role in the overall presentation of a website. It is easier to maintain and provides faster page speed. It is compatibl... 1
- What exactly is CSS? CSS is also known as Cascading Style Sheets. It is a styling language that is used along with HTML to make web pages more interesting and pr... 1
- Derive the formula for kinetic energy of a particle having mass m and velocity v using dimensional analysis Kinetic energy of a body depends upon mass (m) and velocity (v) of the body. Let K.E. ∝ m^x v^y ∴ K.E. = km^x v^y …….. (1) where, k = dimens... 1
- Describe what is meant by significant figures and order of magnitude. Significant figures: Significant figures in the measured value of a physical quantity is the sum of reliable digits and the first uncertain... 1
- The pH value of gastric juice in the human stomach is about 1.8 and in the small intestine it is about 7.8. C. Ionised in the small intestine and almost unionised in the stomach 1
- Kirchhoff’s first law, i.e., ΣI = 0 at a junction, deals with the conservation of (A) charge Kirchhoff’s first law, i.e., ΣI = 0 at a junction, deals with the conservation of charge 1
- When the balance point is obtained in the potentiometer, a current is drawn from Answer: (C) auxiliary battery only In a potentiometer, the auxiliary battery (driver cell) is connected across the potentiometer wire and ke... 1
- Define Potential Gradient. Potential gradient is defined as the potential difference (the fall of potential from the high potential end) per unit length of the wire. 1
- Why should not the jockey be slided along the potentiometer wire? Sliding the jockey on the potentiometer wire decreases the cross sectional area of the wire and thereby affects the fall of potential along... 1
- Are Kirchhoff’s laws applicable for both AC and DC currents? Kirchhoff’s laws are applicable to both AC and DC ’ circuits (networks). For AC circuits with different loads, (e.g. a combination of a resi... 1
- On what factors does the potential gradient of the wire depend? The potential gradient depends upon the potential difference between the ends of the wire and the length of the wire. 1
- Why is potentiometer preferred over a voltmeter for measuring emf? A voltmeter should ideally have an infinite resistance so that it does not draw any current from the circuit. However a voltmeter cannot be... 1
- State the uses of a potentiometer. The applications (uses) of the potentiometer : Voltage divider : The potentiometer can be used as a voltage divider to change the output vol... 1
- What are the disadvantages of a potentiometer? Disadvantages of a potentiometer over a voltmeter : The use of a potentiometer is an indirect measurement method while a voltmeter is a dire... 1